The mouth on fire ulcers can be treated by traditional Chinese medicine, mainly divided into the heart and spleen heat, false fire inflammation, respectively, the use of cool diaphragm powder, Zhi Bai Di Huang Tang plus reduction treatment. 1. Heart and spleen heat syndrome: mainly manifested as recurrent mouth ulcers on the tip of the tongue, sides of the tongue, tongue surface, gums or cheeks. The surface of the ulcer is covered with yellow moss, with a concave base in the center and a raised periphery, with redness, swelling, heat and pain, bitter taste in the mouth, hot heart, short red urine, constipation, and a red tongue with yellow moss. This manifestation is caused by the heart and spleen heat, the treatment needs to clear heat and detoxification (clear the body of heat and toxicity), through the internal organs and diarrhea, can be used to cool the diaphragm San plus reduction treatment. 2. The evidence of inflammation of deficiency fire: the main manifestation of mouth sores recurrent, painful, ulcer surface covered with white moss, the middle of the base of the depression, around the slightly raised, color is not red, shortness of breath, fatigue, sultry zygomatic bone red, thirst, urine short red, tongue tip red moss less or cracked. This manifestation is caused by Yin deficiency of the liver and kidney (insufficient Yin fluid in the liver and kidney), which cannot restrain Yang Qi from rising to inflammation, and treatment requires nourishing Yin and lowering Fire (nourishing Yin essence and lowering Fire Qi). The formula is Zhi Bai Di Huang Tang plus subtractions. If the mouth ulcers do not heal for a long time, it is recommended to consult a doctor in time to identify the cause of the disease and standardize the treatment.